Abstract: A signaling system and method provide a first lamp assembly including one or more light generating devices configured to activate to inform an operator of a vehicle system of information related to movement of the vehicle system. The first lamp assembly includes processing circuitry configured to control and monitor operation of the one or more light generating devices. A wayside station is configured to be communicatively coupled with the first lamp assembly by a single conductive communication pathway. The wayside station is configured to conduct electric current to power the first lamp assembly and to communicate with the processing circuitry of the first lamp assembly via the single conductive communication pathway.